The Duplex Moon Atlas is the ultimate tool for telescopic observers of the Moon's surface. The new concept combines unique features: ¿ two separate sections for users of refractors with star diagonal and reflectors ¿ based on a high resolution digital model rather than photos or drawings ¿ 38 charts of the whole lunar nearside with consistent shadow setting ¿ 8 additional charts of areas of the lunar farside which can be seen by earthbound observers in favorable libration conditions ¿ 1261 named main features, including all named craters, mountains, valleys, hills, and rilles of the lunar nearside ¿ about 6000 secondary craters to 10° of the nearside's rim ¿ all impact and landing sites of human spacecraft ever to touch the lunar surface ¿ alphabetical index of all features and sites The Duplex Moon Atlas is based on the high resolution digital Wide Angle Mosaic (WAC) by the camera on board the NASA Lunar Reconnaissance Orbiter (LRO) satellite, which consists of 1300 individual images with a resolution of 145m per pixel. The Duplex Moon Atlas is designed to be used at the eyepiece. The colors are optimized for usage with a red torch at night. Atlas pages are printed to the margin and with the wire-o binding, pages can be spread out easily. Printed on laminated paper, dew just wipes off easily and the atlas will last a long time. The second edition features brighter maps. Additionally, some errors were eliminated.